Agree with the above, I find the PG cabs to be a little bit dark/muffled. Hopefully they will get the Bias Amp 2 engine ported for you soon and then you can use the Celestions and the mic placement stuff, along with the Dynamic tone adjustment.
In the interim, I would get some good IRs and experiment with those using your FRFR cab. There's also the Amp match feature and tonecloud to explore. When I started Amp matching my own stuff I finally started to gel with Bias.